Before Covid-19 hit, the latest research showed we were more polarised than ever. We broadly agree on the issues - it's the emotions where things get tricky. If someone is part of the other tribe then we want little to do with them. And the more polarised we are, the more prone we are to what philosophers call 'knowledge resistance' - rejecting information that doesn't fit our worldview. If we're in a situation where identity trumps truth, is there anything that can pull us back to reality? Peter Pomerantsev, author of This Is Not Propaganda: Adventures in the War Against Reality, looks at whether Covid-19 could bring us back towards a sense of shared reality - or whether it might push us further apart. Presenter: Peter Pomerantsev Producer: Ant Adeane Editor: Jasper Corbett